Discharge-chute for concrete-mixers



c. M. CLARKE.

DISCHARGE CHUTE FOR CONCRETE MIXERS.

JPPLICATldN FILED JAN; 31, 1918.

Patented Mar. 16, 1920.

Fl Z.

FIC'LE.

INVENTOB able number, "and their depth, length, incli: nation, or othercharacteristics maybe va-f- State of Pennsylvania haveinv ntedcertainnew and usefulf'ImproveI-nentsin Discharge- Chutes *for'Commie-Mixers of which the" followin-g'isa'speeifi a 1 invention refersto improvements in concrete mixers .oi thegrotary' type,

v and; particularly to a discharge chute there for; It has in View toprovidea discharge v chute which is; capable of being made oper 'a tive"to conduct the mixture out of the mixergor inoperative, by clos ngjandopen- ,i'ng the sides of a chute;

z In the" drawings I hav shown thejinven tion-as embodied with'a typicalconstruction ofmixi'ng drum, it being underst od that tha improveddischarge chuteis not mess sari'ly de endent on'the interiorconstruet'ionof the mixer, as to its feeding or charg ing' and 'mixingelements. 7 I

the drawings,'which show preferred forms f the invention, 7

'Figure"1'isa view in elevation of the d s (1 of a' -mix rprovided withmy invention :'*F'g.- 2 is a verticalsectiona-l view on the line II,.IIof 1iig.-1'-;: LII; I s I g 3 is'aviewsi' 'lar to Fig. 1' ShOWlng theadjustable chute members in open'posi- Fig,- 4 is a-simila detail View;showin a modified constmctionaf 111 the drawingsfi is themix'erfdrumrotatably mounted on: rollers 3 and havlng an annul-arrack 4ior-en'gagement'by a driving pinion all of well known construction. 1:

Miners of this typeare usuallyiprovided at each'end with apartlyclosing-header.

fianger5," 6; respectively; each open at the center for introduction ofthe raw material and removal of the mixture respectively.

ments, as a series of individual blades 8, 9, P

or the like. 1 V v 7 Theseelementsare of any-desiredor suitried ormodified to suit the requirements or to conform; to the standardconstruction 'of'the particular mach ne ith which my kjppliqationifliedf was 31,191 18. sci-m1" no: 214;514:-

' r vis onaries-cunts "m concanramxnns.

improved discharge chute is incorporated,

Without in any way afiect-ingits construction or operation 1 V Thepurpose in view-in mixers of them tary drum type is to thoroughly mixthe sand, gravel, cement, and Water, and to advance the same toward thedischarge end, so that a: batch may be taken/from the Imachineas neededfrom time totime. Ordin'arily a" Wheelbarrow eachdischarge'. 1

Various kinds of discharge devices have been used, either attached toand revolving with the drum or mounted independent thereof, and arrangedto discharge the mixture outwardly or to returnit back to the interior,as with the pivotalclosedbottom chute," or otherwise. I -My dischargechute utilizes apair of opening and closing'sides 10, 10 ,-the upperedges ofiWhich-arehingedto supporting rods orpins-11,11, these partsextending inwardly-of the open rear "end of the-drum;

The openingand closing of adjustable chute members preferably; form anextensionof a stationary normally closed chute12 leading outwardly ofthe drumand terminating there beyond at'a position suitable for discharge into a barrow or the like; As shown, the compound chute isV-shape'cl, in which case the movablesides 10 will hang vertic'allyjwhenopen, as in Fig. 3, so as not to I interfere with the free fallingdownof the mixture within the drum. "lVhen closed, as in Fig. 1, these sidesform atrough and 'conformgenerally to the stationary trough 01'chute'12, andfoperate to collect a portion of the mixture as it iscarried aro'und'by the rear portions of the blades, 01' the pockets 13thereof, and discharge it by gravity down through the sloping.passageway and onto the discharge chute 12; i

In Fig. 4 I show a modified construction in which the adjustable sides10 are curved transversely,. so that when together, they formpractically semi-circular trough. When open the sideshang in thepositions shown infdotted lines.

The adjustable chute sides 10 maybe actuated by'any suitable operatingmeans, as a lever 14 pivoted by a shaft 15 in abearing or bearings 16 atone or both ends of the ma- 7 chine;

load is desired at V i discharge mechanism can be operated from eitherend, in which case the levers should be secured to the shaft 15.

The lever 1d at the dischargeend of the machine is pivotally connectedby links 17,

17 at each side of its pivotal bearinglfi by their inner ends, and toarms 18 of the hinged sides 10, at their outer ends by pivotalconnections 19. If desired, a spring 20 may be connected to lever 14 at21 and to a connection 22 vertically below the shaft bearing.v

bracket 23 which provides the pivotal bearing 16, said bracket beingrigidly mounted on outer supporting framework as by. bolts 23. However,any other wellknown means may be employed, if desired, for fixedlyholding the lever and the chute sides in open orclosed position, as bythe usual segment and lever actuated locking key in common use'withrailroad switch levers.

The relative length of the sides 10 as to the permanent chute 12, andother features of the construction, may be made to suit the design,conditions of use, etc. of the machine V wardlyj of the machine for aslong a time as g as a whole. An advantage in the closed bottom deliverychute section 12 is thatany leakage outside of the machine is avoided,

and When the'sides 10 are opened, any adteriorof the machine by gravity.Thefconstruction and operation ofthe deyice will be readily understoodand ap- I reciated by all tlioseaccustomed to this as'sfof machines.While open the sides 10 hang pendently without eifect, but when they areclosed together, they immediately collect the falling mixture anddeflect it out desired, and the discharge operation. may be discontinuedat will by mere operation of the lever. Y a 1 1 a V What I claim is 1.In combination witha rotary concrete mixer drum having a separatefixedly mounted inclined discharge chute leading from the mixer to theexterior thereof, a pair of similarly inclined hinged sides extendingsaid sides.

from the inner end of chute into the mixer interior at its discharge endportion, means for opening and closing the hinged sides together,andmeans independent of the mixer drumproviding hinge supports for 2. Incombination with a rotary concrete 'mixer drum 7. having a separatefixedly mounted inclined discharge chute leading from the mixer to theexterior thereof, a pair ofsimilarly inclined hinged sides extendingfrom theinner end of said chute into the mixer interior at its dischargeend portion, means independent of the mixer drum providing hingesupports forsaid sides, a 'pivoted-operating lever and a supporttherefor, and means connecting the lever and the hinged sides wherebythey may be opened and closed together.

3.111 comblnation with a rotary concrete "mixer drum having a 1 separatefixedly mounted inclined discharge chute leading from the mixer to theexterior thereof, a pair of similarly inclined hinged; sides extendingfrom the inner :endof saidchute into 7 the mixer interior at itsdischarge end portion, means independent ofthe mixer drum providinghinge supports for said side, a pivoted operating lever and a supportthere? for, and links connecting the lever at opposite sides of'itspivotal mounting with: pivotal bearings on the hinged sides whereby theymay be opened and closedtogether; heringconcrete will be returned to thein- 4:. In combination with airotary concrete mixer drum having separatefixedly mounted 111Cl1I16Cl dischargechute .leadmg from the mixer to theexteriorthe'reof, a pair 1 means connecting the lever and the hingedsides wherebythey may be opened and closed together, "and a springconnected withthe lever and its support adapted to hold'the lever andthe hinged sides in open or closed position. 3

In testimonywhereof I hereunto aflix my signature. a a

a r CHARLES CLARKE. i

